A self-routing switching network composed of sorting cells interconnected as a bit-permuting network and, in particular, as a banyan-type network, and the concomitant general self-routing control mechanism for routing packets over such networks. The self-routing mechanism includes a theoretical approach...http://www.google.com.tw/patents/US7099314?utm_source=gb-gplus-share專利 US7099314 - General self-routing control mechanism over bit-permuting switching networks